Context: I study aerodynamics and want to design and build an RC wing to put the theory I learned into practice. The essence of the theory I learned is: Given some mass of wing building material, how do we build the most efficient wing? To actually do this in practice and apply the theory, I need an estimate of the strength of my wing building material (more specifically the spar).
Question: I do not know structural mechanics but I need an estimate of the max bending moment a rod can withstand. Is there any convenient "bending strength coefficient" which I can look up for the rod material, then plug into some relatively simple equation to find the max bending moment of a given rod? If not what would be the easiest way to get this estimation without fully diving into structural mechanics.